I've seen and bowled against a BUNCH of 2 handers, and it can be just as much of a benefit as a hindrance.
I have a high rev rate and speed as it is, so I don't need to go two handed to get the same effect. I've got the 1 handed game down pat. I can only say what I've been told so many times, both verbally and shown.
2 handed bowlers TEND TO BE (Not ARE, but TEND TO BE.) less accurate than one handed bowlers. They get more area, but then the lanes fry and they're in trouble a lot of the time. It all takes skill and it's all a different type of game. The game is evolving, and I have no problem with the 2 handed bowlers.
I don't foresee myself ever being one, but I don't think it gives a significant advantage any more than anything else does. I personally think that a rich person who can afford to buy a new ball every other week has the biggest advantage of all. I don't worry about it. There are advantages and disadvantages to everything, and there is no defense in bowling. 2 handed works great on a house shot for league, but get on a sport shot or on a broken down shot and they'll struggle too.
I hope 1 handed bowling doesn't become "obsolete" as some may say, but we'll see.
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Bakersfield, California
Robb's Pro Shops
Rev Rate: 400-450
Speed: 16-17 mph
Current Average: 236